This test method is a standard procedure for measuring dissolved oxygen (DO) in water and wastewater samples using a membrane electrode (electrochemical sensor). This method is widely used for environmental monitoring, wastewater treatment, and water quality assessments.
This test method is a procedure to determine Carbonaceous Biochemical Oxygen Demand (CBOD₅) over a 5-day incubation period. CBOD measures the amount of dissolved oxygen consumed by microorganisms specifically during the oxidation of carbonaceous (organic) material, excluding oxygen demand from nitrogenous compounds like ammonia. This method is commonly used for evaluating the organic pollution load… Continue reading CBOD
This test method is a colorimetric test used to determine Chemical Oxygen Demand (COD) in water and wastewater samples. COD measures the amount of oxygen required to chemically oxidize organic and inorganic matter in a sample, indicating the pollution or organic load. This method uses a dichromate digestion followed by spectrophotometric measurement.
This test method is a classic analytical technique used to determine ammonia nitrogen (NH₃-N) in water samples. It involves alkalizing the sample to convert ammonium ions to ammonia gas, which is then distilled, captured in an acid solution, and quantified by titration. This method measures the concentration of ammonia as nitrogen and is widely used… Continue reading Ammonia as N [Water]
This test method is a colorimetric procedure used to determine ammonia nitrogen (NH₃-N) in water and wastewater samples. The method uses the automated phenate reaction, in which ammonia reacts with phenol and hypochlorite under alkaline conditions to form a blue-colored indophenol complex. The intensity of this color is measured spectrophotometrically and is directly proportional to… Continue reading Ammonia as N Low Range
This test method is a colorimetric procedure used to determine ammonia nitrogen (NH₃-N) in water and wastewater samples, with a pre-analysis distillation of the test sample. The method uses the automated phenate reaction, in which ammonia reacts with phenol and hypochlorite under alkaline conditions to form a blue-colored indophenol complex. The intensity of this color… Continue reading Ammonia as N Low Range with Distillation
This test method is based on Standard Methods for the Examination of Water and Wastewater and is used to determine alkalinity in water samples. Alkalinity measures the water’s capacity to neutralize acids. A measured volume of water sample is placed in a beaker. The sample is titrated with a standardized sulfuric or hydrochloric acid solution… Continue reading Alkalinity